When there is nothing that stands out, I usually resort to playing with the compensation dial (or you can do spot metering) to get some silhouettes and light-dark dynamics. Also look for reflections or different angles.
That's very neat, it's almost the opposite of the problem you usually have when photographing people, but it works really well to create a unique mood.
Inspired by street style: https://youtu.be/yRkZc8jcHas